> For the complete documentation index, see [llms.txt](https://docs.zk.link/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zk.link/developer/sdk/changelog/transactions/10-update-global-var.md).

# UpdateGlobalVar

### Parameter

Parameter is an interface which contains 5 types of struct

#### type ParameterFeeAccount

```go
type ParameterFeeAccount struct {
	AccountId AccountId
}
```

This parameter is used to modify the collect-fee account.

#### type ParameterInsuranceFundAccount

```go
type ParameterInsuranceFundAccount struct {
	AccountId AccountId
}
```

This parameter is used to modify the insurance fund account.

#### type ParameterMarginInfo

```go
type ParameterMarginInfo struct {
	MarginId MarginId
	TokenId  TokenId
	Ratio    uint8
}
```

This parameter is used to modify the margin info in the specified index.

#### type ParameterFundingInfos

```go
type ParameterFundingInfos struct {
	Infos []FundingInfo
}
```

This parameter is used to ppdate the funding rates to accumulated funding rates of the Global Vars for all position(contract pair) in this period.

**type FundingInfo**

```go
type FundingInfo struct {
	PairId      PairId
	Price       BigUint
	FundingRate int16
}
```

#### type ParameterContractInfo

```go
type ParameterContractInfo struct {
	PairId                PairId
	Symbol                string
	InitialMarginRate     uint16
	MaintenanceMarginRate uint16
}
```

This parameter is used to modify the info of every perpetual contract pair.

### type UpdateGlobalVarBuilder

```go
type UpdateGlobalVarBuilder struct {
    FromChainId  ChainId
    SubAccountId SubAccountId
    Parameter    Parameter
    SerialId     uint64
}
```

The builder is used to build new [UpdateGlobalVar](#type-updateglobalvar) transaction.

### type UpdateGlobalVar

[UpdateGlobalVar](/developer/api-and-sdk/transaction/update_global_var.md) transaction type, it's a opaque data type.

#### func NewUpdateGlobalVar

```go
func NewUpdateGlobalVar(builder UpdateGlobalVarBuilder) *UpdateGlobalVar
```

Create a new [UpdateGlobalVar](#type-updateglobalvar) transaction.

#### func (\*UpdateGlobalVar) GetBytes

```go
func (*UpdateGlobalVar) GetBytes() []uint8
```

Get the encoded bytes to create the L3 signature. See more in [Private Key and Signature](/developer/api-and-sdk/private_key/funding.md)

#### func (\*UpdateGlobalVar) TxHash

```go
func (*UpdateGlobalVar) TxHash() []uint8
```

Get the transaction hash of the transaction.

#### func (\*UpdateGlobalVar) JsonStr

```go
func (*UpdateGlobalVar) JsonStr() string
```

Get the json string of the transaction.

#### func (\*UpdateGlobalVar) IsValid

```go
func (*UpdateGlobalVar) IsValid() bool
```

Check if the transaction is valid or not.

#### func (\*UpdateGlobalVar) ToZklinkTx

```go
func (*UpdateGlobalVar) ToZklinkTx() ZkLinkTx
```

Change the transaction to the [ZkLinkTx](/developer/sdk/changelog/basic_types.md#zklinktx)